ٱلسَّلَامُ عَلَيْكُمْ وَرَحْمَةُ ٱللّٰهِ وَبَرَكَاتُهُ Ya Ustadhi, حَفِظَكَ اللَّهُ , bid'ah to use the greatest name of 𝐀𝐥𝐥𝐚𝐡 ﷻ just before making any du'a? They do this because 𝐏𝐫𝐨𝐩𝐡𝐞𝐭 𝐌𝐮𝐡𝐚𝐦𝐦𝐚𝐝 ﷺ guided us to make du’a using the names of 𝐀𝐥𝐥𝐚𝐡 ﷻ. بَارَكَ اللَّهُ فِيكَ

Ustadh AbdulAziz al-Haqqan

I don't understand, do u mean that they say ya rahman ya raheem and make dua, this is favored to ask Allah using His Names and Attributes.